418 NOTES ON FLORIDA UNIONID2i—SIMPSON. 
ranges from oval to arcuate, and there is a considerable amount of 
difference in the degree of inflation. Some individuals, which are ap- 
parently adult, are thin, and consequently have compressed teeth; others 
are quite ponderous with transverse cardinals. The epidermis is not 
always dark in adult specimens, as has been stated by Dr. Lea, for I 
have before me a tray containing four examples belonging to Mrs, 
Andrews, collected by F. Rugel in Black Creek, the largest of which is 
2 inches in length by 3 in width, and is quite smooth, a tawny yel- 
low faintly rayed, and having a brilliant coppery violet nacre. One of 
these shells, fully adult, is a bright green, with yellowish rays; the others 
are bronzy green. These specimens passed under the inspection of Mr. 
S. H. Wright, and were labeled by him Unio Websteri, but I believe 
that species to be merely a form of U. obesus. 
Throughout the lake region Unio Buckleyi seems to attain its highest 
development, and is often highly colored externally with yellow, salmon, 
coppery, bronze, or green, and the nacre is sometimes dazzlingly bright. 
U. Simpsoni, from Mr. Wright’s figure and description, appears to be 
one of these forms. I can tell but little about it from the specimens 
sent out. Four shells in Mrs. Andrews’ collection from Lake Monroe, 
to which he has given this name, are young Jayanus, and another lot 
of three adults to which he has given the same name are adults of the 
last-named species, and are exactly typical. Three other Simpsoni (ac- 
cording to Mr. Wright) in this collection from the same lake are U. 
aheneus, and specimens he has sent to Mr. Marsh, and others to the 
writer, are certainly Buckleyi. 
U. Buddianus differs in no character from the species under consid- 
eration, and I can not understand why Mr. Lea should have named it, 
as he described the two at the same time. Part of his Buddianus are 
placed in his collection with Buckleyi and occultus, the remainder near 
orphaensis and symmetricus, several hundred numbers farther on. U. 
Dorei seems to be only a synonym, by Mr. Wright’s figure and descrip- 
tion, and three specimens before me belonging to Mrs. Andrews, which 
he has so labeled, are Simon-pure Buckleyi. U. Orcuttii, of which the 
writer sent Mr. Wright examples from Myakka Lakes, Manatee County, 
is exactly like some of Lea’s typical shells. U. Dalli, from description, 
figure, and specimens which Mr. Wright has sent the Museum (Museum 
No. 91126) and others he has labeled in Mrs. Andrews’ collection, ap- 
pears to be a depauperate Buckleyi. 
All the shells I have seen of the last-named species are eroded, or 
have very dirty black epidermis; the nacre is dull, lurid, purplish, and 
blotched, and they are evidently diseased. U. Whiteianus Lea, from 
the Savannah River, is doubtfully distinct. 
